RF Exposure

FCC ID: SS3-WM3221503

RF Exposure Info

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FCCID_2588754

Bay Area Compliance Laboratories Corp. (Dongguan)                                 Report No.: RDG150107014-00A


FCC §15.247 (i) & §1.1307 & §2.1091- MAXIMUM PERMISSIBLE
EXPOSURE (MPE)
Applicable Standard
According to subpart 15.247(i) and subpart §1.1307, systems operating under the provisions of this section
shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in
excess of the Commission’s guidelines.

Limits for Maximum Permissible Exposure (MPE) (§1.1310, §2.1091)

                           (B) Limits for General Population/Uncontrolled Exposure

Frequency Range          Electric Field          Magnetic Field          Power Density          Averaging Time
     (MHz)              Strength (V/m)           Strength (A/m)            (mW/cm2)               (minutes)

     0.3–1.34                 614                       1.63                    *(100)                30
     1.34–30                  824/f                     2.19/f               *(180/f²)                30
     30–300                   27.5                      0.073                    0.2                  30
    300–1500                    /                         /                     f/1500                30
  1500–100,000                  /                         /                      1.0                  30

f = frequency in MHz; * = Plane-wave equivalent power density;

According to §1.1310 and §2.1091 RF exposure is calculated.


Calculated Formulary:
Predication of MPE limit at a given distance
S = PG/4πR² = power density (in appropriate units, e.g. mW/cm2);
P = power input to the antenna (in appropriate units, e.g., mW);
G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain
factor, is normally numeric gain;
R = distance to the center of radiation of the antenna (appropriate units, e.g., cm);


Calculated Data:

                                                  Conducted        Evaluation       Power       MPE
          Frequency       Antenna Gain
                                                    Power           Distance       Density      Limit
            (MHz)
                        (dBi)       (numeric)   (dBm) (mW)            (cm)        (mW/cm2)    (mW/cm2)
               2406.5     2           1.58      28.63     729.46     20.00             0.23     1.0

Result: The device meet FCC MPE at 20 cm distance




FCC Part 15.247                                                                                  Page 7 of 47



Document Created: 2019-10-24 22:56:56
Document Modified: 2019-10-24 22:56:56

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